.px2rem(@name, @px) {
    @{name}: @px / 75 * 1rem;
}
html, body{
    height: 100%;
}
body{
    display: flex;
    flex-direction: column;
    background-image: url(../imgs/chenshi.png);
    background-repeat: no-repeat;
    background-size: 100% 100%;
}
.header{
    display: flex;
    .px2rem(height, 100);
    .px2rem(line-height, 100);    
    color: #0079ff;
    text-align: center; 
    background: #ffffff;
    border-bottom: #b2b2b2 2px solid;
    .left{
        width: 20%;
        display: flex;
        justify-content: center;
        align-items: center;
        img{
            opacity: 0.8;
        }
        .px2rem(font-size, 32);
        p{
            .px2rem(padding-left, 10);
        }
    }
    .center{
        flex: 1;
        .px2rem(font-size, 42); 
        color: #000000;
    }
    .right{
        width: 20%;  
    }
} 
.sec{
    flex: 1;
    overflow: auto;
    .dd{
        display: flex;
        width: 95%;
        margin-left: 5%;
        border-bottom: 1px #ffffff solid;
        .left{
            width: 80%;
            .px2rem(line-height, 100);
            .px2rem(font-size, 30);
            color: white;
            ul{
                width: 90%;
                margin-left: 10%;
                .px2rem(line-height, 100);
                .px2rem(font-size, 28);
                background: rgba(255,255,255,0.5);
                color: white;
            }
        }
        .imgs{
            flex: 1;
            text-align: center;
            .px2rem(line-height, 100);
        }
    }
}
.btn{
    .px2rem(height, 80);
    .px2rem(line-height, 80);
    text-align: center;
    background: #cccccc;
    color: white;
    opacity: 0.8;
}











